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<H1>IBM Visualization Data Explorer Programmer&#39;s Reference</H1>
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<H3><A NAME="HDRDXIA" HREF="progu097.htm#PToC_320">DXIterateArray</A></H3>
<A NAME="IDX1849"></A>
<A NAME="IDX1850"></A>
<P><STRONG>Function</STRONG>
<P>
Iterates through an Array.
<P><STRONG>Syntax</STRONG>
<BR>
<TT><STRONG><BR>
&#35;include &lt;dx/dx.h&gt;<BR>
<P><BR>
Pointer DXIterateArray(ArrayHandle handle, int offset,<BR>
                       Pointer last, Pointer scratch)<BR>
</STRONG></TT><BR>
<P><STRONG>Functional Details</STRONG>
<P>
This routine
can be used when an Array is accessed sequentially.
The Array handle
<TT><STRONG>
handle
</STRONG></TT>
is that obtained through the use of
<TT><STRONG>DXCreateArrayHandle</STRONG></TT>.
<P>
If the Array is constant, a pointer to the constant value is
immediately returned.  If the Array is irregular and the given
<TT><STRONG>
offset
</STRONG></TT>
is 0, the Array data pointer (which is a pointer to the 0th
element of the Array) is returned.  If the
<TT><STRONG>
offset
</STRONG></TT>
is not 0, then the
<TT><STRONG>
last
</STRONG></TT>
parameter should point to the prior Array element, and
(<TT><STRONG>last</STRONG></TT> &#43; itemSize) is returned, where
itemSize is the size in bytes of an item of the Array described by
<TT><STRONG>handle</STRONG></TT>.  If the Array
is compact,
the desired element is calculated.  <TT><STRONG>scratch</STRONG></TT>
should be of a size large enough to hold a single Array item.
<P><STRONG>Return Value</STRONG>
<P>
Returns a pointer to the next item in an Array or returns
<TT><STRONG>NULL</STRONG></TT> (but does not set an error)
code when there are no more items.
<P><STRONG>See Also</STRONG>
<P>
<TT><STRONG>
<A HREF="progu124.htm#HDRDXCAH">DXCreateArrayHandle</A>,
<A HREF="progu149.htm#HDRDXFAH">DXFreeArrayHandle</A>,
<A HREF="progu156.htm#HDRDXGAEY">DXGetArrayEntry, DXGetArrayEntries</A>,
<A HREF="progu180.htm#HDRDXGIS">DXGetItemSize</A>
</STRONG></TT>
<P>
<A HREF="progu046.htm#HDRARHAND">"Array Handling"</A>.
<P><P>
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